Automatic multiple-spindle metal-working machine



Aug. 7, 19 23. 1,45%(9632 L. G. DANIELS AUTOMATIC MULTIPLE SPINDLE METAL WORKING MACHINE Filed Sept. 27 1920 s Sheets-Sheet 1 L1 DANBELQ AUTOMATIC MULTIPLE SPINDLE METAL WORKING MACHINE Sheejns-Sheec 2 Filed Sept.

. Aug.'7, W230 mmmm G. DANIELS AUTOMATIC MULTIPLE SPINDLE METAL WORKING MACHINE Filed Sept, 27 1920 5 Shets-Shet 5 y fiWVENTOR.

ATTORNEY.

Aug. 7, .11

V MLMQM L. (3:. DANIELS AUTOMATIC MULTIPLE SPINDLE METAL WORKING MACHI NE' Filed Sept. 27 1920 5 Sheets-Sheet 4 N6 .3 a 41 I449 51' 1 51 7 L V Aug. "F, 4 EA-WWKEBE 1... 5. DANIELE AUTOMATIC MULTIPLE SPIND LE METAL WORKING MACHINE Filed Sept. 27 1920 .5 Sheets-Sheet 5 G. DANIELS, OF BOGKFOEE'J, ILLINOIS.

AIFTOMATIC IMULTIPLJE-SPINDLE METAL-"WORKING MACHINE.

Application filed deptember 27, 1820. Serial. ItofilfifiL-S.

T 0 oil whom it may concern Be it known that l, LE1? G. DANIELS, a citizen of the United States, residing ,at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Automatic Multiple-Spindle llletal-ll orking Machines, of which the following is a specification.

This invention pertains. to automatic metal working machines, and has'more particular reference to the general type dis closed in my Patentllo. 1,274.859, dated August 6, 1918.,- Such classof machines is characterized by the inclusion of a plurality of tool carriers and work carriers, which are relatively indexed in step by step movements to bring the work successively into operative relation with the various tools;

and at each station a relative movement between the tools'and work is efi'ected, preferably by feed of the tools, to simultaneously perform a plurality of operations. Such machines are further characterized by the provision of mechanism which automatically regulates and controls the V3I101lS movements in a predetermined manner.

The primary object of the present invention ,is to provide an automatic multiple spindle metal working machine of the char acter described, of novel construction designed to obtain a most eihcient means for machining parts in large quantities, with the use of semi-skilled labor to operate the machine after it is set up and timed for the various operations, thus ofi'setting' increasing labor costs and efi'ectually meeting the need for increased production.

Another important object is to generally improve and simplify a machine of the general type disclosed in my patent mentioned above.

Still another object is to provide an automatic metal working machine of the character in mind, designed along-such simple and practical lines as to satisfactorily. and

eiiectually meet the various conditions and requirements of a commercial product.

in furtherance of these general objects, I have embodied in the present machine, certain principles disclosed and claimed in my patent mentioned above, these being embodied in agenerally improved and simplified construction, in combination with other novel features and departures, the principles and construction of which will be described hereinafter.

Referring to the drawing-' Figure 1 is a side elevation of an auto matic metal working machine embodying my improvements;

F ig. 2, a fragmentary view partly in section, of the lower portion of the machine and certain control mechanism therein, in the position shown in Fig. 1;

F ig. 3, a plan sectional view taken substantially on the line 3-3 of Fig. 2;

Fig. 4:, a vertical sectional view taken substantially on the line 44.- of Fig. 3';

Figs. 5 and 6, fragmentary sectional views of a part of the control mechanism sliown in Fig. 2, in neutral and rap-id approach positions, respectively;

Fi 7. a detail section taken on Fig. 8, a. detail section taken on the line t 88 of Fig. 4;

Fig. 9, a fragmentary view, looking at the inner side of the cam bar 9'0, mentioned hereinafter, showing an operative relation of the cam 101. and cam followers;

Figs. 10 and 11, plan and side views respectively, of the parts shown in F ig. 9;

Fig. 12, is a detail section taken on the line 1212 of Fig. 4e; y

Fig. 13, a rear view of lever 92 described hereinafter.

Fig. 14, a horizontal section taken eulostantially on the line 1%1 1 of Fig. 1; and

Fig. 15;, a top view of the gearing for driving the tool spindles. I

it should be understood that the frameor housing of the machine might be of any suitable or preferred constructipn, in the present instance, it consists of a cylindricaltable-supporting portion designated generally by the character 15, a control mechanism housing divided into compartments 16 and 17, and an upright standard 18 carrying an overhead spindle gearing housing, designated generally by. character 19.

A work table 21, supported on the bearing 22 on the housing portion 15 is revoluhle thereupon and about the central vertical cylindrical column 23. This column 23 is rigidly secured to and supported at its lower end upon the central portion 24, integral with the housing 15, and is held in position at its upper end by the housing 19. The work table is adapted to carry a plurality of circumferentially spaced work holders in whatsoever form as may he required. tor the particular work at hand. These-work llll holders may be. either jigs, fixtures or chucks, and in the present instance, the table is constructed to carry six equally spaced work holders. By means of mechanism described hereinafter, the work-table will be rotated in step by step movements to carry the work successively to thedifferent v riage beyond the periphery of the column.

stations at which to be operated upon by the respective tools and to be finally carried to an unloading station at which a new piece of work is substituted for the finished iece.

'The tools are supported by a carriage designated generally by character 25 which slides vertically on' the central column 23 for the purpose of bringing the tools into and out of operative relation to the work on the table. The tool carriage is moved vertica lly by a lead screw 43 engaging a nut 44, which .has diametrically opposed arms 114 extending through slotways 115 in the col. umn 23 and securely bolted to the tool car- The tool carriage has a laterally extending arm 26 slidably engaging the vertical waysv 27 on the upright column 18. as shown in Fig. 14, for steadying and holding the tools in pre erably carried by spindles 28 circumferentially spaced about and mounted for rotation on the carriage 25, as is well known in this art.

' The spindles are driven at the desired speeds by gearing contained within the housing 19. This gearing may be driven by an independent motor or from the same motor which drives the table indexing and tool feeding mechanism which will be de- In the present instance, I

scribed later. have employed but a single motor for driving all of the mechanisms. The motor 29 drives the power shaft 31 (Fig.4) through the agency of a link chain (not shown) connecting with the gear 32 on said shaft. This shaft 31 drives a vertical shaft 33 through means of spur gears 34 and bevel gears 35, and the vertical shaft 33 drives a' horizontal shaft 36 within the housing 19. A vertical shaft 116 journaled in said housing co-axial with the central column 23 is continuously driven from the shaft 36 by bevel gears 117, one of which is integral with a spur gear 37 on the shaft 116. This central gear 37 is in permanent driving connection with all of the tool spindles 28 through means of intermediate shafts 38, 38- and 38, and gearing between these intermediate shafts and the respective spindles. As shown in Fig. 4, the intermediate shaft 38 has a gear 39 meshing with the central gear 37 and a gear 41 of small diameter meshing with a gear 42 of larger diameter on the spindle, thus driving this spindle at 'a relatively slow speed. As shown in Fig. 15, the intermediate shaft 38" has a gear 39' of the same diameter as proper alignment. The tools, not shown, are

the gear 39 meshing with the central gear 37 and is further equipped with a air of gears 41 and 41 meshing respective y with gears '42 and 42" on the adjacent spindles. It follows that the single intermediate shaft 38' drives two spindles at different speeds, by reason of the cluster arrangement of gears of different diameters. he series of intermeshing ears 41- 42,4142. and 41-42" are .c ange gears in the sense that they are quickly removable by removal of the retaining nuts 40, Fig. 4, for

the substitution of other sets of gears of different ratios. This provides a quick, practical and inexpensive means whereby the speed of the respective spindles may be changed. The gearing between the intermediate shaft 38 and the adjacent pairof spindles may be the same as'that just described with respect to the intermediate shaft 381. The tool spindles 28 are splined in connection with their respective driving gears so that the spindles may be moved vertically by the tool carriage 25 as is well known in this art.

The lower end of the carrier lead screw 43, suitably journaled in the housing or base, is equipped with a fixedworm gear 45 and has suitable thrust bearings to take the end thrust resulting from moving the tool carrier vertically. A worm 46.fixed to the feed against vibration during the period that the work is being operated on by the tools. After the tools have been withdrawn, it is desired to index the table in an accelerating movement and then to gradually check its momentum until the table is brought to a stop, thereby performing the indexing movement in a most efiicient manner and without danger of imposing undue strain on the parts. To this end, the table is equipped with a bevel gear 48 which meshes with a bevel pinion 49 fixed to a shaft 51* journalled in suitable bearings in the housmg and equipped with an eccentrioally located block 52 disposed in a slot or guideway 53 diametrically disposed on a rotat-' able member 54. It will be observed that the shaft 51 and the member-54 are eccentric, so that when the member 54 is revolved the block 52 will, move outwardly in the shaft 47 (Fig. 2) drives 'the worm gear 'sldt hj lfldh accelerating movement during oneghalf revolution, and during the rema1ningfi half-revolution, the movement of the block and its shaft 51 Will be gradually diof the member 54; is controlled in part from the work table by means of a locking bar, designated generally by character 55, Fig. 3, and through the agency of a friction clutch on the shaft 56. The locking bar 55, radial- 1y disposed with respect to the work table and slidable lengthwise in suitable bearings, is constantly urged inwardlyby a spring'57 to engage its tapered end 58 ina correspondingly tapered socket 59 in the work table.

.The locking bar is adapted to actuate drivin through means of a lever 61, the shi'ftable element 62 of said clutch to connect the driven member 63 to the shaft 56, and

thereby revolve the member 54 through the chain 64/ The connection between the lever 61 and the shiftable clutch element 62 is best shown in Fig. '8. A pair of yoked members 60 and integrally connected and pivotally mounted as shown, aremonnected respectively to the lever 61 and the clutch yoke. This construction allows lateral movement of the lever 61 due to the locking bar 55 and shaft 56 being non-parallel. The shaft 56 is driven from the power shaft 31 through two sets of reducing gears 65 and 66. It will be manifest that the locking bar effectually secures and holds thework table against rotation and that upon withdrawing said locking bar by means of a slide cam which will be described hereinafter, the lever 61 will be actuated to engage the clutch member 62- 63, thereby causing the member 54: to be revolved and the table to be indexed. Just after the table commences its indexing movement the tapered end 58 of the locking bar will be urged by the'spring 57 against the periphery of the work table so as to be-free to enter the next succeeding tapered socket therein. There is one socket 59.for and corresponding inposition'to each work holder, and when the table has been indexed one station, the locking pin will enter the tapered socket thereat, thereby disengaging said clutch and stopping rotation of the indexing mechanism. Under certain conditions it is desired to index the table more.

than one station at a time, and in such event I provide'plugs 67 for insertion into any of the sockets or openings 59, so as to preclude entrance of the'locking'pin therein, and thus cause the table to be indexed another position or until an open socket 59 is presented to the locking bar. in the present instance, each alternate socket 59 is closed by a plug 67, so

that the work in its cycle will stop at only three stations instead of six as would. be the case if these plugs were removed.

The tool carrier feed mechanism and the automatic control therefor, will now be described. ln the present machine I employ as in my. patent mentioned above, separate controllable devices for driving a feed shaft to produce the rapid approach, feed reverse movements, this being done preferably through means of separate friction clutches. Referring now especially to Fig. 2, these clutches are designated generally by character 68 for the rapid approach, 69 for the feed, and 71 for the reverse. Instead of arranging all of the clutches on a singleshaft as in my former patent, l mount the rapid approach and reverse clutches on a secondary shaft 72 and the feed clutch on the feed shaft 47. These clutches are preferably of a friction type, adapted to be engaged respectively by expander arms. The driving element of the feed clutch is in the form. of a spur gear driven from a spur pinion 73, Fig. 4, in turn driven by change speed gears 74 from the shaft 56. By shifting the expander 75', the expander arm 76 will be actuated to frictionally engage the clutch 69, so as to drive the shaft 47 in a feed movement. A lever 77 is employed to shift the expander 75. The clutches 68 and 71 each include an element in the form of a spur gear in driving connection with the feed shaft 47, the connection between the clutch 68 and the shaft being direct and that between the clutch 71 and the shaft being through the intermediar r of a reversing gear 78, as shown in Fig. 1. The shaft 72 is continuously revolved by means of a spur pinion 7 9, which meshes with the larger spur gear of the set 66, Fig. 4. A single expander member 81, splined on the shaft 72, is adapted to be shifted in opposite directions by means ofthe lever 82 for engaging either the clutch 68 or 71. When shifted to the right as shown in Fig. 2, the expander arm 83 will be actuated to engage the reverse clutch, and when shifted to the left as shown in Fig. 6, the expander arm 84 will be moved to engage the rapid approach clutch 68. lt will be here noted that the part 85 on the expander member 81, which actuates the arm 84, is so shaped that upon continued movement of said member 81, to the left, the arm 84; will drop behind a shoul- 'der on the part 85, thus disengaging the loo slide rod 86inwardly. The slide rod 86 constantly urged to the left, viewing Fig. 2, by an expansion spring 89, may be moved to the right either by a hand lever 91 at the front of the machine or by a lever 92 connected to a controlrod 93. The lever 92, a rear view of which is shown in Fig. 13, comprises upper and lower sections pivotally connected at 90 at an axis substantially at right angles to the lever fulcrum 90'. It will be observed that adouble-jointedconnection is provided between the lever 92 and the rod 93 to allow for the necessary movement incidental to the non-parallel relation of the rods 86 and 93; also that only a one-way connection is provided between the hand lever 91 and the slide rod 86,- so that the latter rod is' free to be operated independvently of the hand lever. The control rod 93 slidably mounted in suitablebearin s to move. in a pla'neparallel with the loc ing bar,,is equipped at its inner end with a ro1ler94adapted to be actuated by one of the cam faces 95 fixed to the work table,

there being one such cam near each socket '59. A'cam is removed in each instance that oneof the "tapered sockets 59 is closed by a I plug 57.

In the position of the parts shown in Figs. 1 to 4 inclusive, the reverse clutch 1s engaged under the influence of the spring 89 so that the feed shaft 47 will be revolved n a direction tofeed the'tool carrier 25 .up-

'wardly to retract the tools. At a predeterminedpoint in this reverse movement,the reverse'clutch will be disengaged, throwing the feed mechanism into a neutral position and stopping the tool carrier. This is done by utilizing movement of.the tool carrier to throw out the reverse clutch just prior to stopping such carrier. Themeans through which the carrier movement is-transmitted, consists of a vertical cam-carrying bar des1gnated generally by character 96 secured to a lateral extension 97 of the work carrier arm 26. This bar 96 carries a plurality of relatively adjustable cams 98, 99 and 101, they be thecam 101, Fig. 9. This cam engages a roller 102 on the locking bar and withdraws such bar, causing the work table to be indexed in the mannerdesgribed above. As 'soon' as the inner end of the locking bar engages the periphery of the table as was described above, the cam 98 on the bar 96 will engage the roller 103 on the control rod 93 and move thisrod outwardly to-a neutral position, that is; one in which the. feed mechanism parts assume the position shown'i'nFig'. 5, with the reverse clutch disgage the rapid approach clutch, in the mana ner shown in Fig. 6. This will cause the tool carrier to be fed down in a rapid traverse movement, the position of the shift-.

able parts of the feed mechanism being main tained by the detent 104 engaging in the next notch 106 in the slide rod 86. When the tools reach the desired proximity to the work the cam 99 on the bar 96 will engage the roller 103 and again move the control rod 93 outwardly, therebyshifting the clutch levers 77 and 82, disengaging the rapid approach clutch 68 and engaging the feed. clutch 69. maintained by the detent 104 engaging in the'outermost notch 107 in.said rod. The I feed depth may be suited to the requirements and in this machine may be anywhere from 1" to 8 inches, accordingto nature of th work. Theffeed will be instantlv stopped at the desired point by a trip device, consisting of a trip rod 108 adjustabley connected to and moving with the arm 97 of the tool carrier, which rod actuates a lever 109, which in return withdraws the detent 104, allowing the compressed spring 89 to instantly disengage the feed clutch and throw in the reverse clutch. In order that the feed clutch shall be instantly disengaged, I provides lost motion connection between the lever 77 and rod 86, consisting of a slot in said lever and a pin on the rod, whereby the rod in its movement under the influence of the spring 89 will require certain momentum and strike the shifter lever 77 with such impact as to stop the feed instantly.

Referring back to the point in the oper ation when the rapid approach clutch is engaged, causing the tool carrier and its connected parts to travel downwardly, it will be observed that the roller 102011 the locking bar will be disposed in the path of the cam 101; and in order to avoid interference of these parts, I have so constructed this cam thatit may be shifted to one side and give way to .the roller as the cam movs down past the roller. This operation is in-. dicated-in dotted lines in Fig. 9, it being This position of the rod 86 is i You - mangoes observed that the ihclined cam plate 101 is "pivoted at 111 and urged by a spring 112 to the operative position shown in full lines. The cam is thus free to swing out of the way of the roller so as to avoid interference, and will be returned to operative position after having passed the roller.

A hand trip device is provided permitting release of the detent 104 at will, and con sists of a handle 113 suitably connected to the lever 109 so that by pulling said handle outwardly the lever 109 will be actuated similarly to actuation by, the trip rod 108.

In practice, the machine will be set up to perform whatever operations are' required for the particular work to be done.

The

, [spindles might be equipped with either bormg, reaming, facing or turning tools, or for tappin with collapsible taps, or for drilling multiple ofi'set holes by means of attaching a multiple spindle auxiliary head to any of the spindles. The table will be e uipped with suitable work holders or iixtures and the various cams and control mechanisms set to secure the desired table-index- "ing movements'and control of the tool carnage. Assuming the machine in operation in the position shown in Figsl to 4 inclusive, the tool carriage has just started upwardly in its rapid reverse movement. This will continue until the carriage nears V its highest elevation, whereupon the locking bar 55 will be withdrawn by the cam 101 on the cam bar 96, thereby causing the table to be indexed. It will thus be seen that the tool carriage in its reverse movement actuates mechanism for causing the work table to be indexed. Just after the table has commenced its indexing movement, and the look ing bar 55 is riding on the periphery of the table, the cam 98 on the bar 96 will actuate the control rod 93, so as to disengage the reverse clutch and throw the feed mechanism into neutral, whereupon the tool carriage will stop. During this time, the work table is indexing, and just prior to the finish of its indexing movement, the next succeeding cam 95 will actuate the control rod 93, throwing in the rapid approach clutch and causing the tool carriage to be fed downwardly in a rapid traverse movement. It will thus be noted that the work table in its indexing movement actuates mechanism which puts the tool carriage into operation again. Shortly after the rapid approach is thrown in, the locking har enters the next succeeding socket 59 in the work table, thereby disengaging the indexing clutch and locking the/work table in a set posit-ion. Vfhen the tools iritheir downward move ment reach the desired proximity to the work, the cam 99 on the bar 96 operates the control rod 93 to disengage the feed clutch and cause the tools to be slackened in their stopped and the reverse clutch to be en gaged, thus completing a cycle of the machme. e,

It is believed that theforegoing conveys a clear understanding of the objects prefaced'above and of the principles and operation of my improvements, and while 1 have illustrated and described but a single working embodiment thereof, it should be understood that various changes might be made in the construction and arrangement without departing from the spirit and scope of the invention as expressed in the appended claims:

I claim:

1. In a multiple spindle machine of the character described having a work carrier and a multiple spindle tool carrier, mechanism for relatively moving said carriers in rapid approach, feed and reverse move- -ments, mechanism for indexing one of the and means operable at the will of an dpera tor for causing the first mentioned mecha- I nism, during control thereof by said control mechanlsm, to function diflerent from the predetermined automatic operation? 2. In a multiple spindle machine of the character described having a work carrier and a tool carrier, mechanism for relatively moving said carriers in rapid approach, feed and reverse movements, mechanism for indexing one of the carriers, control mechanism including a cani bar moving with one of thecarriers and having cams for putting said indexing mechanism into operation, for effecting said feed movement, and for stopping said reverse movement, and means operated by the indexing carrier for effecting said rapid approach movement.

3. In a multiple spindle machine of the character described having a work carrier and a tool carrier, mechanism for relatively moving said carriers in rapid approach, feed and reverse movements, mechanism for indexing one of thecarriers, control mechanism including a cam bar moving with one of the carriers and havin cams for putting said indexing mechanism into operation, for effecting said teed movement, and for stopping said revere movement, and a trip mechanism operated by the cannmoving carrier for stopping the feed at a predetermined "point. p

a. in a multiple spindle machine of the character described having a work carrier and a tool carrier, mechanism for relatively moving said carriers in rapid approach,- fe ed 5. In a multiple spindle machine of the character described havin and a tool carrier, mechanism for relatively a work carrier moving said carriers in rapid approach, feed and reverse movements, mechanism for indexin one'of the carriers, control mechaincluding a cam bar movin with one of the carriers and having cams or putting said indexin mechanism into operation, for

effecting sai feed movement, "and for stopsaid reverse movement, and a manually controllable means operable at the will of an operator for, eifecting any operation obtained by automatic operation of said control mechanism. V

6. In a machine of the character described,

' the combination of a work carrier and a tool carrier, one of which is adapted to be indexed and the other moved toward and from the index-carrier, a locking bar havinga tapered end adapted to enter a socket in the index-carrier,'means operated by said other carrier in its movement relatively to the index-carrier for withdrawing said lockifig bar, and means operated by the looking bar in-its withdrawing movement for indexing the index-carrier.

7. In a machine of the character described,

'the combination of a suitable frame, an upright cylindrical column secured at its upper and lower ends respectively to the frame, a work carrier revolved about the column, atool carrier slidable longitudinally'upon the column toward and from the Work carrier, a screw shaft co-axially within the column, an internally threaded member on the tool carrier engaging the screw shaft, and means for revolving the shaft for moving the tool carrier lengthwise on said column.

8. In a machine of the character described, a work carrier and a tool carrier, one of which is adapted to be moved toward and from the work, cam-carrying means traveling with said movable carrier, mechanism adapted to be actuated by'a cam on said means for imparting movement to -said carrier, said cam-carrying means being movable in opposite directions, and a shiftable cam carried by said means and operative only uponmovement of said means in one direction.

9. In a machine of the character described, the combination with a work carrier and a tool carrier, one of which is adapted to be moved with respect to the other in rapid approach, feed and reverse movements, of mechanism for effecting suchmovements comprising a feed shaft, a clutch thereon for. efiecting the feed movement, a secondary shaft, a rapid approach and a reverse clutch on the secondary shaft adapted when engaged to respectively drive the feed shaft, and mechanism for engaging and disengaging said clutches in timed relation to efiect said rapid approach, feed and reversemovements.

10. In a machine of the character described, the combination with a work carrier and a tool carrier, one of which is adapted to be moved with respect to the other in rapid approach, feed and reverse move from said set position, and means oper-e able at the will of an operator for also revleasing said control member from'said set position.

11. In a machine of the character described, the combination with a work carrier and a tool carrier, one of which is adapted to be indexed and the other moved in rapid approach, feed and reverse movements, of mechanism for indexing the index carrier, mechanism operable on-the other carrier for producing said rapid approach, feed and re- Verse'movements, and cam-carrying means moving with the latter carrier for putting said indexing mechanism into operation while the other carrier is in its reverse movement, for stopping said movement and for subse uently eifectingthe feed movement.

12. n a machine of the character described, the combination of a central upright column, a work-carrier and a tool-carrier concentric with the column, one being revoluble thereabout and the other reciprocable thereon tobring the tools into and out of operative relation to the work, a lead screw Within the column, and a nut engaging said screw, the column having diametrically opposed slots and the nut having opposed arms extending through said slots and g fixed to the reciprocable carrier, stationary vertical ways at one side of the column, and a rigid arm extending laterally from the reciprocable carrier and slidably guided on 1 said Ways for steadying and holding said carrier in alignment.

13. In a machine of 'the character described, the combination of a work carrier rier. a continuously driven gear concentrically within the spindles, a plurality of intermediate shafts, and gearing between the central driving gear and said shafts and between the latter and the spindles, one ot'said intermediate shafts being disposed between two adjacent spindles'and having gear connections therewith of different ratios.

1-1-. A machine of the character described comprising a base, an upright standard rigid with respect to and reaching above the base at one side thereof, a column concentric with and fixed to the base and reaching above the same, a work table mounted to revolve upon the base and about said column, a multiple spindle tool carrier reciprocable upon the column above the table, and an overhead housing containing gearing for driving the spindles and supported wholly by said standard and column 15. A machine of the character described comprising a base, an upright column rigid on the base, a work table revoluble about said column, a multiple spindle tool carrier reciprocable upon said column above the table, an upright housing rigid on the base and shaped to over-reach said column above the tool carrier, and gearing within and supported by said over-reaching portion of the housing. for driving the tool spindles.

16. In a machine of the character described, the combination of a base, an upright column fixed to the base, a work table revoluble about said column, a multiple spindle tool carrier vertically slidable upon the column, an upright housing at one side of the Work table rigid on the base and overreaching and associated with said column above the tool carrier, and mechanism within and supported by said over-reaching housing for driving the tool spindles.

17. In a machine of the character described, the combination of a base, an upright column fixed to the base, a work table revoluble about said column, a multiple spindle tool carrier-vertically slidable upon the column, an upright housing at one side of the work table rigid on the base and overreaching and associated with said column above the tool carrier, mechanism within and supported by said over-reaching housing for driving the tool spindles, and mechanism within the base for indexing the work carrier and reciprocating the tool carrier.

18. Ina machine of the character described, the combination of a central upright column, a work-carrier and a tool-carrier concentric with the column. one being revs oluble thereabout and the other reciprocable thereon to bring the tools into and out of base, a central column and a side housing rigid on the base, a- Work table revoluble upon the base and about saidcolumn, a multiple spindle tool carrier vertically slidable upon said column, said side housing shaped to over-reach the tool carrier, gearing within said over-reaching housing for driving the spindles, said gearing being accessible through the top of said over-reaching housing and including change gears, whereby the speed of the splndles may be varied.

20. A multiple spindle machine of the character described, the combination of an index work carrier, a' multiple spindle tool carrier reciproeable toward and from the work carrier, the spindles being circumferentially spaced, a drive gear positioned cen- 55 trally within the spindles, a plurality ofintermediate shafts, permanent gearing be tween said intermediate shafts and the drive gear, and gearing between the intermediate shafts and spindles including change gears whereby the speed of the spindlesmay be varied.

LEE G DANIELS.

to the 65 

